I played with the serial <> RDOS transfer a little bit more this evening. I was able to transfer an image of CDOS + INIT into the machine and start it up directly from memory - however in order to make sure that this is doable on a Cromemco bank switched memory card, I have to keep it within 32k ... I discovered that CDOS won't INIT a DS/DD disk when it's gen'd for 32k (I get a weird error about a non-existant drive 'h') ... It works fine if gen'd for 48k or 64k. It will however INIT a SS/SD disk when it's gen'd for 32k ... so it's going to be a bit of a multi-step process. First, you download CDOS+INIT to memory and INIT a SS/SD disk - then you transfer a SS/SD disk image with 48k gen'd CDOS and INIT - this will let you INIT any type of disk. Once you INIT a DS/DD disk, then you can transfer the full CDOS and Cromix images. I'm doing this with 5.25" drives - I assume most people will be able to dig up a 5.25" drive to bootstrap, even if their machine as 8" drives - I'm genning the CDOS to have Drives A=Small B=Large C=Small and D=Large - that way you should be able to INIT the right type of drive on a system with either two small or two large drives. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html